{"product_id":"abb-cr309x100b-mechanical-interlock-for-contactors","title":"Abb CR309X100B Mechanical Interlock for Contactors","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ABB CR309X100B is a mechanical interlock accessory designed to prevent two contactors from engaging simultaneously. This type of interlock is a critical safety component in motor control and power switching applications, ensuring that opposing contactors — such as those used in reversing starters or transfer switch circuits — cannot both close at the same time. Licensed electricians and industrial maintenance technicians install this interlock as part of a properly engineered motor control center or panel assembly. It provides a hard mechanical barrier against simultaneous energization, reducing the risk of phase-to-phase faults.\u003c\/p\u003e\n\u003cp\u003eThe CR309X100B is suited for use in commercial and industrial electrical installations where dual-contactor configurations require positive mechanical lockout. Typical applications include forward-reverse motor starters, automatic transfer switching, and multi-speed motor control circuits. The interlock mounts between two compatible ABB contactors and operates without electrical power, making it a purely mechanical safeguard. It is commonly installed in manufacturing facilities, pump stations, HVAC control panels, and similar environments where motor reversing or source transfer is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003ePrevents simultaneous closure of two contactors for hard mechanical lockout protection\u003c\/li\u003e\n  \u003cli\u003ePurely mechanical operation — no auxiliary power required\u003c\/li\u003e\n  \u003cli\u003eDesigned for use in reversing starter and transfer switch configurations\u003c\/li\u003e\n  \u003cli\u003eCompact form factor sized to mount directly between paired contactors\u003c\/li\u003e\n  \u003cli\u003eReduces risk of phase-to-phase fault caused by simultaneous contactor engagement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style mechanical interlock accessory for use with compatible ABB contactor pairs in motor control and power switching assemblies. Consult ABB documentation to verify contactor series compatibility before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed electrician in accordance with NFPA 70 (NEC) and applicable local codes. De-energize and lock out the panel or motor control center completely before servicing or installing this interlock. Verify that both contactors are identical in frame size and confirmed compatible with this interlock kit before assembly. Do not attempt to force or modify the interlock mechanism, as doing so will compromise its safety function.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 8.02 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (L x W x H)\u003c\/strong\u003e: 21 inches x 11.5 inches x 4.5 inches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ABB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: CR309X100B\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":51383440441650,"sku":"CR309X100B","price":176.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312678400.jpg?v=1782596675","url":"https:\/\/voomisupply.com\/products\/abb-cr309x100b-mechanical-interlock-for-contactors","provider":"Voomi Supply","version":"1.0","type":"link"}